09-26-2015, 11:29 AM | #1 |
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hinge pins
with parts from four different doors and a bit of fabricating I have six useable hinges. I had to drill and drive out the pins, so I am thinking or ordering the oversize (.250) pins. should i ream the holes to .250? i noticed the good holes were a bit larger than the pins giving some clearance. i think the hole in middle piece is larger than the holes in the outer part.
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09-26-2015, 11:58 AM | #2 |
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Re: hinge pins
buy regular and oversized, use what fits, ream only if necessary. Note also that it is critical to make sure that all pins line up when installed on the A pillar. You might want to work on that earlier than later to avoid additional headaches, considering the hinges are from multiple sources.
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09-26-2015, 07:19 PM | #3 |
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Re: hinge pins
The original pins were 15/64ths (.234) not .250. At least that is the size of pins on my Coupe.
.250 are the Oversized pins. Many times folks do not know this and use .250 drift to remove the pins and have very difficult time of removing them. |
09-27-2015, 08:42 AM | #4 |
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Re: hinge pins
some of the holes aren't true or perfectly round so I thought it might be best to clean up to oversize for a better fit.
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09-27-2015, 10:02 AM | #5 |
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Re: hinge pins
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09-27-2015, 10:17 AM | #6 |
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Re: hinge pins
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09-27-2015, 11:00 AM | #7 |
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Re: hinge pins
Larry, what did you use to drill out the hinge pins? I have a mean one that is putting up quite a fight. An air hammer will not move it even with a hinge pin press tightened to the failure point. I tried to drill the tough one and all are of hardened steel. My drill bits will not even "bite" into them nor will a file score the one I did get out. Henry's steel was tough. Any suggestions anyone?
John |
09-27-2015, 11:35 AM | #8 |
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Re: hinge pins
The best way to go is to use a roll pin. The roll pin is actually a spring and it will fill an oversize hole. Roll pins are made of high strength steel, and I have had them in my Coupe since 1980 without issue. Roll pins are available in Home Depot, ACE Hardware, etc.
Cut the heads off of the original pin leaving about 0.25" length of their shanks. After driving the roll pins into place, press the original pin heads into the hinges.
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Bob Bidonde |
09-27-2015, 01:09 PM | #9 |
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Re: hinge pins
i'm a newby at model a's but an old hand at tinkering. here's what I did...
1 st I clamped the part in my mill vice, centered up best I could by eye and went as deep as i could with a 3/16 end mill. 2nd.. went to my drill press and went nearly all the way through with a 7/32 drill bit. 3rd heated the hinge to dull red and with a 3/16 long drift punch and a few wacks with the hammer out it came. did all six this way.I may have wandered a little so i'm going oversize with the pins. |
09-27-2015, 02:38 PM | #10 |
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Re: hinge pins
Thanks Larry. Mine is still on the car, with the pin just laughing at all my efforts. My drill bit won't touch it. I will have to think of Plan C for the pin, whatever that is as Plans A and B have failed.
John |
09-27-2015, 03:42 PM | #11 | |
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Re: hinge pins
Quote:
i always go up through the bottom about a quarter of the way, until i have a little bit of the pins wall left.. it will then punch right out the top.. |
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09-27-2015, 05:21 PM | #12 |
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Re: hinge pins
FYI: There is a Bosch concrete drill bit sold at Home Depot. After breaking a bit while drilling a snapped off 3/8" Henry NF bolt, I ruined a half dozen drills trying to get past the broken bit in the broken bolt. As a last resort, I bought the Bosch drill bit and that thing ate it's way through the bolt, broken bit, and everything in between. Worth a try...........
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09-27-2015, 07:00 PM | #13 |
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Re: hinge pins
I just used regular bits with no problem. if you can't do the mill trick just try to stay centered as possible so as not to damage the holes in your hinges. stop short of going all the way through so the drift punch has something to stop against. good luck.
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09-27-2015, 07:04 PM | #14 |
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Re: hinge pins
ebay...ford model A door hinge repair kits,
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09-29-2015, 04:39 PM | #15 | |
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Re: hinge pins
Quote:
Last edited by 5window; 09-29-2015 at 05:31 PM. |
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12-07-2021, 07:43 AM | #16 |
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Re: hinge pins
I know this is old post, but curious how you would go about this.
'28 roadster, driver's side lower hinge. Top part is good, lower part is a tad loose. I guess ream both to .250 oversize or I was thinking of knurling the lower part of the pin to keep the top original size. |
12-07-2021, 08:11 AM | #17 | |
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Re: hinge pins
Quote:
From my perspective, either ream the entire set of hinge loops to 0.250", -or TIG weld the lower end and re-drill. Do not use a MIG weld as the CO2 generally makes the weld metal harder and more difficult to resize. This is one of those things where owning a knee Mill and having a welder can make this task much easier. |
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12-07-2021, 09:21 AM | #18 | |
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Re: hinge pins
Quote:
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